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Czechoslovak Journal of Physics

, Volume 56, Supplement 3, pp E101–E108 | Cite as

Mössbauer studies of magnetic Fe2O3/SiO2 nanocomposites

  • A. Lančok
  • K. Závěta
  • C. Savii
  • K. Barčová
Article

Abstract

A large variety of glass and glass ceramics may be obtained by sol-gel process from hydrolysis of tetraethoxysilane. The transformation involves hydrolysis and polycondensation reactions leading to the growth of clusters that eventually collide together to form a gel. The structure and properties of the final product have been found to be strongly dependent on the initial conditions of preparation. Silica nanocomposites based on Fe2O3/SiO2 were prepared with the help of ultrasonic activation and subsequent annealing in nitrogen atmosphere or air with concentrations of iron oxide of about 20 to 30wt.%.

Key words

Mössbauer spectroscopy nanoparticles silica nanocomposites 

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Copyright information

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • A. Lančok
    • 2
    • 1
  • K. Závěta
    • 1
  • C. Savii
    • 3
  • K. Barčová
    • 4
  1. 1.Laboratory of Mössbauer SpectroscopyJLLT Institute of Physics and Fac. of Mathematics and Physics Charles UniversityPragueCzech Republic
  2. 2.Institute of Inorganic ChemistryŘež near PragueCzech Republic
  3. 3.Institute of Chemistry Timisoara of Romanian AcademyRomania
  4. 4.Institute of PhysicsTechnical University of OstravaOstravqa-PorubaCzech Republic

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